1. Respiratory distress syndrome;Soll,1992
2. Other acute lung disorders;Halliday,1992
3. The arterial/alveolar oxygen tension ratio: an index of gas exchange applicable to varying inspired oxygen concentrations;Gilbert;Am Rev Resp Dis,1974
4. Classifying perinatal death: fetal and neonatal factors;Hey;Br J Obstet Gynaecol,1986
5. Prophylactic surfactant vs treatment with surfactant;Soll,1992